[Bug 1111189] New: yumBackend started with each `docker start`

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1111189

            Bug ID: 1111189
           Summary: yumBackend started with each `docker start`
           Product: Fedora
           Version: 20
         Component: docker-io
          Assignee: lsm5(a)redhat.com
          Reporter: ldoktor(a)redhat.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: admiller(a)redhat.com, golang(a)lists.fedoraproject.org,
                    hushan.jia(a)gmail.com, lsm5(a)redhat.com,
                    mattdm(a)redhat.com, mgoldman(a)redhat.com, s(a)shk.io,
                    vbatts(a)redhat.com



Description of problem:
Hello guys, today I noticed 100% utilization followed by each `docker run` or
`docker start`. It wasn't caused by the docker itself, but with each instance,
yumBackend is executed. It never happened with older version.

 4806 ?        RN     0:00 /usr/bin/python
/usr/share/PackageKit/helpers/yum/yuBackend.py get-updates none


Version-Release number of selected component (if applicable):
docker-io-1.0.0-1.fc20.x86_64

How reproducible:
always

Steps to Reproduce:
1. docker run -t -i fedora bash
2. top
3. ps ax |grep yum

Actual results:
yumBackend is started and takes couple of secconds in 100% utilization
 4806 ?        RN     0:00 /usr/bin/python
/usr/share/PackageKit/helpers/yum/yuBackend.py get-updates none

Expected results:
Apart from container no other processes should be started. (I can run `docker
run -t -i fedora bash -c exit` which finishes immediately and the only process
using cpu is the yumBackend process)

Additional info:
I tried executing `busybox sh`, `bash -c exit`, .... I even rebooted the
machine but the results are the same.

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